John Piper 1903 - 1992 Cwm Idwal and Llyn Idwal signed John Piper (lower left) oil on canvas unframed: 64 by 76.5cm.; 25¼ by 30¼in. framed: 84 by 97.5cm.; 33 by 38½in. Executed in 1947. We are grateful to Hugh Fowler-Wright for his kind assistance with the cataloguing of the present work. The present work relates to a mixed media version of the same view which is now in the Whitworth Art Gallery, Manchester, and was previously in the collection of Kenneth Clark.